#CSS problem: Parent won’t scale to child height when using percentage for `valueToRound` in `round()`: `.child { block-size: round(up, 100%, 5lh) }` Circular issue? Ideas for an elegant solutions? CodePen: codepen.io/df/pen/myVXw... round(): developer.mozilla.org/en-US/docs/W... #HTML #webbed

Most important update of the WWDC: Anchor Positioning! 🥰https://webkit.org/blog/16993/news-from-wwdc25-web-technology-coming-this-fall-in-safari-26-beta/#anchor-positioning

thanks for asking! This is the document I was referring to in my response w3c.github.io/sustainablew...

I just realized that today is #CSSYesterday.

@hidde.blog @cssday.nl Do you think there is a need for official regulation and legislation regarding the energy consumption of digital products such as websites? Or are there already such initiatives? (Like we have with accessibility in the EU.) #cssday

🤯 @amitsheen.bsky.social is going to build a CPU in CSS now. Yeah… I mean… why not, right!? #cssday

Styling form controls will be SO MUCH easier in the (hopefully not so far) future. @ntim.bsky.social demonstrates examples from the CSS Form Control Styling Level 1 specification draft (www.w3.org/TR/css-forms...) #cssday

More anchors! @ishadeed.com #CSSDay Truly amazing how powerful this next generation of responsive UI features is with :has(), anchors, container queries, style queries, *ALL THE THINGS* (and there are so so many more)

So, so true. The gap between design tools and the possibilities of the CSS based web platform is getting bigger year by year. @ishadeed.com at #cssday. (Reminds me of @matthiasott.com‘s talk last year cssday.nl/2024/#matthias)

A #sketchnotes for the talk "Multicol and fragmentation" by @rachelandrew.bsky.social‬ at the @cssday.nl #cssday

Anyone using a headless printer to browse? 🤪 #cssday

Implementing column-span is challenging (github.com/w3c/csswg-dr...). It could lead to many unwanted layout issues. @rachelandrew.bsky.social: “If something terrible happens, it should at least be spec'd so that the terrible thing happens the same in every browser.” #cssday

Great CSS trick documented by @ishadeed.com for showing conditional border radius (border radius on desktop, none on mobile) border-radius: max(0px, min(8px, calc((100vw - 4px - 100%) * 9999))) / 8px; (via @nerdy.dev at #CSSDay) ishadeed.com/article/cond...

@cssday.nl @rachelandrew.bsky.social Why aren’t there logical margin at-rules, like for example @block-start-inline-end? Or wouldn’t it make sense for printed pages? And what about margin at-rules for columns in multi-column layouts? #cssday

Would it be weird if I put on my sunglasses? 😎 #cssday

Summarize #cssday 😉😭

I really like how open and transparent @cydstumpel.nl is. She always credits people who’ve offered advice in her talk about CSS view transitions. So much respect for live coding. #cssday

@cydstumpel.nl demonstrates how to pause CSS view transitions and use the `::view-transition` pseudo class (developer.mozilla.org/en-US/docs/W... ) to inspect and debug view transitions. #cssday

#cssday > .urinal { overflow: visible; }

@cssday.nl @miriam.codes Could CSS @functions used across shadow DOM boundaries? #cssday

“Complexity is a moving target. We can't make it go away. But we can move it around.” So, so true. @miriam.codes at #cssday

The DAO of CSS. John Allsop shares some valuable wisdom that can easily be forgotten in the daily work. #cssday

Such a nerdy, interesting and jam-packed first #cssday talk by @nerdy.dev. Too much stuff (in VERY good way) to live post here! Embrace native scroll functionality and enhance it gracefully. (and Adam took accessibility into account too). Check out his Code Pens and slides nerdy.dev/cssday-2025

Fight fascism!

This is basically the point at which every civilized state should grant asylum to every trans person. It feels like there are so few states that are not trying to kill them all. When conservatives say "trans men/woman are not men/woman" what they mean is "because I want them to be a corpse".

Fight fascism!

Hey